| Sliven to Coin | 1,694.06 mi (2,726.32 km) |
| Sliven to Colindres | 1,496.72 mi (2,408.74 km) |
| Sliven to Collado-Villalba | 1,564.21 mi (2,517.35 km) |
| Sliven to Colmenar Viejo | 1,551.48 mi (2,496.86 km) |
| Sliven to Colmenarejo | 1,565.97 mi (2,520.19 km) |
| Sliven to Conil de la Frontera | 1,772.96 mi (2,853.30 km) |
| Sliven to Consuegra | 1,566.94 mi (2,521.75 km) |
| Sliven to Corbera de Llobregat | 1,250.65 mi (2,012.73 km) |
| Sliven to Cordoba | 1,663.20 mi (2,676.66 km) |
| Sliven to Coria del Rio | 1,743.24 mi (2,805.48 km) |
| Sliven to Crevillente | 1,452.61 mi (2,337.74 km) |
| Sliven to Cuarte de Huerva | 1,392.27 mi (2,240.63 km) |
| Sliven to Cubellas | 1,266.81 mi (2,038.74 km) |
| Sliven to Cuellar | 1,566.43 mi (2,520.93 km) |
| Sliven to Cuenca | 1,480.71 mi (2,382.97 km) |
